Do business activities
The ISO Navigator™ database hyperlinks the ISO 9000 principles and the ISO 9001 requirements; and explains them in plain English with practical guidance.
ISO 9001: Process control (4.1 c)
Criteria and methods needed to ensure that both the operation and control of these processes are effective. This could be demonstrated with stated objectives, instructions and or procedures as required for consistent output of the processes. This is the 'Plan' part of the PDCA process.